Electric-lighting fixture



ELECTRIC LIGHTING FIXTURE Filed March 5, 1921 Patented Dec. 2, 1924.

UNITED STATES PATENT @FFMZE.

MAX HERSKOVITZ, OF CHICAGO. ILLINOIS; WILLIAM HERSKOVITZ AND CHARLES WEINFELD EXECUTORS 0F SAID HERSKOVITZ, DECEASED.

ELECTRIC-LIGHTING FIXTURE.

Application filed March 5, 1.921.

To all whom it may concern:

Be it known that I, MAX Hnasxovrrz, a citizen of the United States, and a resident of Chicago, Cook County, and State of Illinois, have invented certain new and useful Improvements in ElectricLigl'iting Fixtures, of which the following is declared to be a full, clear, and exact description;

This invention relates to electric lighting fixtures and its principal object is to provide an insulator for lighting fixtures and form ing part of the ceiling or wall connection, which is of simple, practical and economical construction. In many large cities it is necessary to provide insulation between the electric lighting fixture and its support, to guard against short circuits, and usually such. insulation comprises large blocks of insulation material and is comparatively ex pensive. One of the objects of this invention is to provide a light insulator which may be readily and quickly assembled with the fixture. Another object is to provide an insulator for the fixture which is flexible or non-rigid, whereby the fixture may center itself and hang plumb.

The invention is clearly illustrated in the accompanying drawing, in which 1- Fig. 1 is a vertical section throu h the up er portion of an electric lighting fixture and its supporting connection showing a simple embodiment of the present invention. Fig. 2 is a horizontal section taken on line 22 of Fig. 1. Fig. 3 is a perspective view of a hickey and bushing comprising two members of the device. Fig. 4 is a view partly in side elevation and partly in central vertical section, showing a slightly modified form of the present invention. Fig. 5 is a view partly in side elevation and partly in central vertical section of a second slightly modified form of the invention, and Fig. 6 is a view, partly in side elevation and partly in central vertical sec ion of a third modified form of the invention.

Referring to said drawing and first to Figs. 1 'to 3, inclusive, which illustrate the preferred embodiment of the invention, the reference character 10 designates an outlet box of ordinary construction, and 11 the electric conduits or pipes that contain the usual electric conductor cords 12. The usual screw threaded supporting stud 13 is secured to the outlet box, as is customary, and forms the means for supporting the Serial No. 449,963.

fixture. and well known, and require no further description so far as this specification is concerned.

The electric lighting fixture, in which the preferred en'ibodiment of The inventiim is illustrated in Figs. 1 to 3, has a stem it which is separated from the stud 13 by an insulated connection which permits of relative movement between the stud 13 and stem 14. Between the stem 1 1 and stud is interposed a threaded insulating plug 15 formed of fiber or other tough, hard insulating material, and said insulatin plug con pletely insulates the fixture from the stud 13. One end of said insulating plug is screwed into one end of a coupling 16 and its other end is screwed into a bushing 17, and between said coupling and bushing is interposed a flange or shoulder 18 formed of insulating material, which, if desired, may be integral with or separate from the insulating plug 15. Preferably, the insulating plug may be positively secured against removal from the coupling 16 and bushing 17 by pins 19, which extend through the coupling, plug and bushing. The coupling 16 is internally threaded at its upper or free end, and screws upon the supporting stud 13. as is clearly shown in Fig. 1. Preferably the two threaded ends of the coupling 16 are separated by a wall or partition. 20.

In cases where a stem 14. of usual construction is employed in the fixture, I provide a flexible or loose connection between said stem and the insulating plug to permit the fixture to center itself and hang plumb,

in case the stud is out of plumb. Said connection comprises a hickey 22 having a centrally apertured top portion 23 and a bottom portion 24 connected by a side wall 25, having transverse openings 21 formed therein through which the conductor cords may pass. The bottom portion 24iof the hickey is centrally apertured and the aperture is threaded to receive the screw threaded end of the stem 14:- The bushing 17 projects out through the opening in the top portion 23 of the hickey 22 and at its lower end it is formed with a flange 27 upon which the top portion 23 of the hicliey 22 rests. Preferably the upper surface of the flange 27 is made convex and the underside of the top portion of the hickey 22 is made concave, thereby providing a sort of ball-and-socket- The parts described are common the stem may center itself upon the bush narrowenough to pass through the open '21 1n the side wall of the hickey insulating the stem from like connection between the two, where and hang plumb. The flange 27 is ina in assembling the bushing and hickey, bushing 1s inserted through an opening; in

the side wall of the hickey and its apertured end thrust out through the opening in the top portion thereof. The flange of the b ing 17 1s made long enough to on i the edges of the side walls .25 when ing is in place in the hici ey (see Fig. 2)., whereby the bushing and hic" 1 are he against relative rotation with respect to each other.

In the modified form illustrated in Fig.

4 *t-lieioupling 16 and insulating plug 15 iai ayybeeconstmcted as 1n the preferred-form, ---but the flexible connectlon is omitted, and

the stem 14 is "directly connected with the insulatln'g plug 15. In this form, the stem 14; is shown as havina outlet ooeninP' 1'' "a hollow stein 1%? is used, as in the modified forrnfshown in Fig. 4, but in this case the stem is fornied with a reduced externally screw threaded neck 14. 'sulated-"trom the coupling 16 by an exter- "nally and internally threaded sleeve 15' which is' formed of insulating material, and

The stem is inwhich screws into the coupling 16 and upon thejneck 14E of the stem. A block 15 of insul ting" material is interposed between the eiitfnle'end of the neck 14 and wall or par- "tition 20*of the coupling and a shoulder or ring 18 of insulating material is interposed between the lower end of the coupling and "bocly' of the stern -14.

In the modified form illustrated in B, 'tliecoupling 16 is internally threaded at "it "upper end and its lower end is reduced in diameter to leaye a neck 16 he stem 14 reconnected to the coupling; 16 by a screw which extends through the neck portion 16 and'through a cross wall 14 of the stem 14-. The coupling andstem are completely insulated "froiii each other by a fibre spacing shoulder 18, interposed between the stem and coupling, fibre washer 15 between the screw wand coupling, a fibre washer 15 between the neck 16 and cross wall 14 a fibre sleeve 1'5 betwe n the shank of the screw and internal face of the neck 16 and a fibre sleeve ll'r between the neck 16 and internal taco oi? the stem 14 The stems oi the various forms may con] prise the tubular chandelier member of light. ing fixtures, and the coupling, insulating plug, bushing, hickey and stem of the pre ferred form may be assembled to provide a unit ready for installing; in buildings. Likewise, the coupling; insulating plu and stem coinpij'isinn the modified forms are assmnbled to pi vido units for installation. Cow venieutly. in assembling the unit a bar may be inserted in the openings of the hicltey and outlet openings of the stem for use as a handle when screwing the parts upon the insulating plug, and said bar will also act as a stop to prevent the insulating plug from entering beyond the outlet hole in the hickey or stem.

More or less variatio the or; it details of construction is p.v e without departing from the spirit or this inroutiou: 'l' dcsire, therefore, not to limit myself to the enact form of the construction shown and described, but intend, in the lollowii claims, to point out all oi the invention disclosed herein.

I claim as new licttcrs Patent:

1. An insulator for electric lighting li\'- tures, comprising a coupling threaded at both ends, a hickey havingoutlet openiuzls for conductor cords and an open annular top, the underside of which is concave, an internally threaded bushing; capable of" lirinp' inserted into said hickey through said. outlet openings and eitteudingr out through said opening in the top of said hic rcy and having; a flange, convex upon its upper face, and upon which said l'iickey rests, said l'langre extending into said outlet openings for en gageinent with the side wall the hichey. whereby the coupling and hickey are held against relative rotation, a threaded insulating plug secured in said bushing); and con-- plinn and an insulating shoulder interposed between said coupling and l'l lfillllljl'.

52. An insul tor for elec ric light-ind ture, coinpri a. iliua; thrcadrd, at both ends, a hiclrey hav u open annular top the underside of which concave. said hiclrey havingalso an out et open ng" in side, and an int rinllr threaded bushing: capable 05?. being inserted into said hickey through. said outlet o iieuiiu'r and extending: out through said open top ot the hickey and having); a CODY-3.? flaner on which the concave underface of the top route. a threaded in sulatinp; plug: secured in said bushing and coupling and an insulat 2; shoulder interposed between said counh and bushing.

ll nsiisnovirz.

and desire to secure by bill 

